EP 2431973 A1 20120321 - Apparatus and method for enhancing audio quality using non-uniform configuration of microphones
Title (en)
Apparatus and method for enhancing audio quality using non-uniform configuration of microphones
Title (de)
Vorrichtung und Verfahren zur Verbesserung der Audioqualität mithilfe einer nicht einheitlichen Konfiguration von Mikrofonen
Title (fr)
Appareil et procédé d'amélioration de la qualité audio utilisant une configuration non uniforme de microphones
Publication
Application
Priority
KR 20100091920 A 20100917
Abstract (en)
An audio quality enhancing apparatus and method is provided in which a microphone array has a non-uniform configuration and thus a beam pattern of a desired direction is obtained in a wide range of frequencies including higher frequency bands and lower frequency bands even when the microphone array is relatively small. The audio quality enhancing apparatus includes at least three microphones which are disposed in a non-uniform configuration, a frequency conversion unit configured to transform acoustic signals input from the at least three microphones to acoustic signals of frequency domain; a band division and merging unit configured to divide frequencies of the transformed acoustic signals into bands based on intervals between the at least three microphones and to merge the acoustic signals in the frequency domain into signals of two channels based on the divided frequency bands; and a two channel beamforming unit configured to reduce noise of signals including input from a direction other than the direction of a target sound by performing beamforming on the signals of the two channels and to output the noise-reduced signals.
IPC 8 full level
G10L 21/02 (2006.01); G10L 21/0208 (2013.01); G10L 21/0216 (2013.01)
CPC (source: EP KR US)
G10L 21/0208 (2013.01 - EP US); H04R 1/227 (2013.01 - KR); H04R 1/40 (2013.01 - KR); H04R 3/00 (2013.01 - KR); H04R 3/005 (2013.01 - EP); H04R 9/08 (2013.01 - KR); G10L 2021/02166 (2013.01 - EP US); H04R 2205/022 (2013.01 - KR); H04R 2430/03 (2013.01 - KR)
Citation (search report)
- [XY] MITSUNORI MIZUMACHI AND SATOSHI NAKAMURA ET AL: "Noise Reduction using Paired-microphones on Non-equally-spaced Microphone Arrangement", 20030901, 1 September 2003 (2003-09-01), pages 585, XP007006702
- [Y] S.D. BEDROSIAN: "Nonuniform linear arrays: Graph-theoretic approach to minimum redundancy", PROCEEDINGS OF THE IEEE, vol. 74, no. 7, 1 January 1986 (1986-01-01), pages 1040 - 1043, XP055014925, ISSN: 0018-9219, DOI: 10.1109/PROC.1986.13581
- [Y] M.A. PALLAS ET AL: "Nearfield noise source localisation with constant directivity arrays : a comparison - Application to tram noise", NAG/DAGA 2009, 23 March 2009 (2009-03-23), Rotterdam, pages 100 - 103, XP055014929, Retrieved from the Internet <URL:http://perception.inrialpes.fr/people/Perrier/siteoueb/articles/PALLAS_NAGDAGA09.pdf> [retrieved on 20111215]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2431973 A1 20120321; EP 2431973 B1 20151125; CN 102421050 A 20120418; CN 102421050 B 20170412; KR 101782050 B1 20170928; KR 20120029839 A 20120327; US 2012070015 A1 20120322; US 8965002 B2 20150224
DOCDB simple family (application)
EP 11181569 A 20110916; CN 201110288677 A 20110919; KR 20100091920 A 20100917; US 201113114746 A 20110524